Home / 21,555.84-29,746.80-12,126

Finding the Fourth Proportional to 21,555.84, 29,746.80 and 12,126

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Solution

The fourth proportional to 21,555.84, 29,746.80 and 12,126 is: 16,733.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.84 : 29,746.80 = 12,126 : x
  2. Step 2: Convert to fraction form
    21,555.84/29,746.80 = 12,126/x
  3. Step 3: Cross multiply
    21,555.84x = 29,746.80 × 12,126
  4. Step 4: Simplify right side
    21,555.84x = 360,709,696.80
  5. Step 5: Solve for x
    x = 360,709,696.80/21,555.84
  6. Step 6: Final answer
    x = 16,733.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.